<?php
namespace app\home\controller;

use think\cache\driver\Redis;
class WxController extends BaseController
{

	/*
    配置参数
    */
    private $config = array(
        'appid' => "wx2759a229ef410aef",//公众号ID
        'mch_id' => "1599598091",//"1440493402",   /*微信申请成功之后邮件中的商户id*/
        'api_key' => 'ce0bfd15059b68d67688884d7a3d3e8c',
        'appsecret' => '648923a26624549c1fae6e0445bd2436',
    );


    //获取预支付订单
    public function getPrePayOrder($body, $out_trade_no, $total_fee, $notify_url, $open_id){
        $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";

        $onoce_str = $this->getRandChar(32);

        $data["appid"] = $this->config["appid"];
        $data["body"] = $body;
        $data["mch_id"] = $this->config['mch_id'];
        $data["nonce_str"] = $onoce_str;
        $data["notify_url"] = $notify_url;
        $data["out_trade_no"] = $out_trade_no;
        $data["spbill_create_ip"] = $this->get_client_ip();
        $data["total_fee"] = $total_fee;
        $data["trade_type"] = "JSAPI";
        $data["openid"] = $open_id;
        $s = $this->getSign($data, false);
        $data["sign"] = $s;

        $xml = $this->arrayToXml($data);
        $response = $this->postXmlCurl($xml, $url);

        //将微信返回的结果xml转成数组
        return $this->xmlToArray($response);
    }



    //执行第二次签名，才能返回给客户端使用
    public function getOrder($prepayId){
        $data["appId"] = $this->config["appid"];
        $data["timeStamp"] = '"'.time().'"';
        $data["nonceStr"] = $this->getRandChar(32);
        $data["package"] = "prepay_id=".$prepayId;
        $data["signType"] = 'MD5';
        $s = $this->getSign2($data);
        $data["paySign"] = $s;
        return $data;
    }

  
    /*
    生成签名
    */
    function getSign($Obj)
    {
        foreach ($Obj as $k => $v)
        {
            $Parameters[strtolower($k)] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false, false);
        //echo "【string】 =".$String."</br>";
        //签名步骤二：在string后加入KEY
        $String = $String."&key=".$this->config['api_key'];
//        echo "<textarea style='width: 50%; height: 150px;'>$String</textarea> <br />";
        //签名步骤三：MD5加密
        WL($String, 'sign');
        $result_ = strtoupper(md5($String));
        return $result_;
    }


    /*
    生成签名
    */
    function getSign2($Obj)
    {
        foreach ($Obj as $k => $v)
        {
            $Parameters[$k] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false, true);
        //echo "【string】 =".$String."</br>";
        //签名步骤二：在string后加入KEY
        $String = $String."&key=".$this->config['api_key'];
//        echo "<textarea style='width: 50%; height: 150px;'>$String</textarea> <br />";
        //签名步骤三：MD5加密
        WL($String, 'sign');
        $result_ = strtoupper(md5($String));
        return $result_;
    }



    //获取指定长度的随机字符串
    function getRandChar($length){
        $str = null;
        $strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
        $max = strlen($strPol)-1;

        for($i=0;$i<$length;$i++){
            $str.=$strPol[rand(0,$max)];//rand($min,$max)生成介于min和max两个数之间的一个随机整数
        }

        return $str;
    }



    //数组转xml
    function arrayToXml($arr)
    {
        $xml = "<xml>";
        foreach ($arr as $key=>$val)
        {
            if (is_numeric($val))
            {
                $xml.="<".$key.">".$val."</".$key.">";

            }
            else
                $xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
        }
        $xml.="</xml>";
        return $xml;
    }


    //xml转数组
	public function xmlToArray($xml)
	{
	    libxml_disable_entity_loader(true);
	    $xmlstring = simplexml_load_string($xml,'SimpleXMLElement',LIBXML_NOCDATA);
	    $val = json_decode(json_encode($xmlstring),true);
	    return $val;
	}




    //post https请求，CURLOPT_POSTFIELDS xml格式
    function postXmlCurl($xml,$url,$second=30)
    {
        //初始化curl
        $ch = curl_init();
        //超时时间
        curl_setopt($ch,CURLOPT_TIMEOUT,$second);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch,CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        //运行curl
        $data = curl_exec($ch);
        //返回结果
        if($data)
        {
            curl_close($ch);
            return $data;
        }
        else
        {
            $error = curl_errno($ch);
            echo "curl出错，错误码:$error"."<br>";
            echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
            curl_close($ch);
            return false;
        }
    }



    /*
        获取当前服务器的IP
    */
    function get_client_ip()
    {
        if ($_SERVER['REMOTE_ADDR']) {
            $cip = $_SERVER['REMOTE_ADDR'];
        } elseif (getenv("REMOTE_ADDR")) {
            $cip = getenv("REMOTE_ADDR");
        } elseif (getenv("HTTP_CLIENT_IP")) {
            $cip = getenv("HTTP_CLIENT_IP");
        } else {
            $cip = "unknown";
        }
        return $cip;
    }



    //将数组转成uri字符串
    function formatBizQueryParaMap($paraMap, $urlencode, $strtolower)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v)
        {
            if($urlencode)
            {
                $v = urlencode($v);
            }

            if($strtolower)
            {
                $buff .= $k . "=" . $v . "&";
            }else{
                $buff .= strtolower($k) . "=" . $v . "&";
            }
            
        }
        $reqPar;
        if (strlen($buff) > 0)
        {
            $reqPar = substr($buff, 0, strlen($buff)-1);
        }
        return $reqPar;
    }



    /**
    xml转成数组
     */
//    function xmlstr_to_array($xmlstr) {
//        $doc = new DOMDocument();
//        $doc->loadXML($xmlstr);
//        return $this->domnode_to_array($doc->documentElement);
//    }
    function domnode_to_array($node) {
        $output = array();
        switch ($node->nodeType) {
            case XML_CDATA_SECTION_NODE:
            case XML_TEXT_NODE:
                $output = trim($node->textContent);
                break;
            case XML_ELEMENT_NODE:
                for ($i=0, $m=$node->childNodes->length; $i<$m; $i++) {
                    $child = $node->childNodes->item($i);
                    $v = $this->domnode_to_array($child);
                    if(isset($child->tagName)) {
                        $t = $child->tagName;
                        if(!isset($output[$t])) {
                            $output[$t] = array();
                        }
                        $output[$t][] = $v;
                    }
                    elseif($v) {
                        $output = (string) $v;
                    }
                }
                if(is_array($output)) {
                    if($node->attributes->length) {
                        $a = array();
                        foreach($node->attributes as $attrName => $attrNode) {
                            $a[$attrName] = (string) $attrNode->value;
                        }
                        $output['@attributes'] = $a;
                    }
                    foreach ($output as $t => $v) {
                        if(is_array($v) && count($v)==1 && $t!='@attributes') {
                            $output[$t] = $v[0];
                        }
                    }
                }
                break;
        }
        return $output;
    }



    /**
    *
    *前端-获取APP信息（用于分享）
    *
    **/
    public function returnWechatMessage()
    {
        $sign = $this->request->param('sign', '');
        $zz_url = $this->request->param('zz_url', '');
        if(empty($sign) || $sign != 'zzh_sign')
        {
            return return_msg(2001, '非法请求');
        }

        if(empty($zz_url))
        {
            return return_msg(2001, '非法链接，非法请求');
        }

        $redis = new Redis();


        $str_token = 'getWechatAccessTokenQmyx';
        $str_jsapi = 'getWechatJsapiTicketQmyx';
        $access_token = $redis->get($str_token);

        if(empty($access_token))
        {
             //获取access_token
            $one_data = $this->getWechatAccessTokenQmyx('zzh_get_acc_token');
            WL(['msg' => '获取获取access_token', 'data' => $one_data], 'wx_fx');
            if(!empty($one_data['access_token']))
            {
                $redis->set($str_token, $one_data['access_token'], 5400);
                $access_token = $one_data['access_token'];
            }
        }

        
        $jsapi_ticket = '';    
        if(!empty($access_token))
        {
            $jsapi_ticket = $redis->get($str_jsapi);
            if(empty($jsapi_ticket))
            {
                //获取jsapi_ticket
                $two_data = $this->getWechatJsapiTicketQmyx($one_data['access_token'], 'zzh_get_jsapi_ticket');
                WL(['msg' => '获取获取access_token', 'data' => $two_data], 'wx_fx');
                if(!empty($two_data))
                {
                    $redis->set($str_jsapi, $two_data['ticket'], 5400);
                    $jsapi_ticket = $two_data['ticket'];
                }
            }
        }

        if(empty( $access_token) || empty( $jsapi_ticket))
        {
            return return_msg(2001, '获取信息失败');
        }
        
        $data["noncestr"] = $this->getRandChar(32);
        $data["jsapi_ticket"] = $jsapi_ticket;
        $data["timestamp"] = '"'.time().'"';
        $data["url"] = $zz_url;
        
        $s = $this->getSignSha1($data, false);
        $data["signature"] = $s;

        $return_data = [
            'appId' => $this->config['appid'],
            'timestamp' => $data['timestamp'],
            'nonceStr' => $data['noncestr'],
            'signature' => $data['signature'],
        ];
        return return_msg(200, $return_data);
    }


    /*
    生成签名
    */
    function getSignSha1($Obj)
    {
        foreach ($Obj as $k => $v)
        {
            $Parameters[$k] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false, false);
       
        //签名步骤三：SHA1加密
        $result_ = sha1($String);
        return $result_;
    }


    //获取微信access_token
    public function getWechatAccessTokenQmyx($type = '')
    {
        if(empty($type) || $type != 'zzh_get_acc_token')
        {
            return false;
        }

        //开始获取
        $url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.$this->config['appid'].'&secret='.$this->config['appsecret'];
        $user = json_decode(file_get_contents($url));
        $data = json_decode(json_encode($user),true);//返回的json数组转换成array数组
        return $data;
    }


    //获取微信jsapi_ticket
    public function getWechatJsapiTicketQmyx($token, $type = '')
    {
        if(empty($token) || empty($type) || $type != 'zzh_get_jsapi_ticket')
        {
            return false;
        }

        //开始获取
        $url = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token='.$token.'&type=jsapi';
        $user = json_decode(file_get_contents($url));
        $data = json_decode(json_encode($user),true);//返回的json数组转换成array数组
        return $data;
    }

}